Terminal Multiplexer

http://tmux.github.io/

Enhanced ftp client from NetBSD

https://ftp.netbsd.org/pub/NetBSD/misc/tnftp/

Enhanced FTP server from NetBSD

https://ftp.netbsd.org/pub/NetBSD/misc/tnftp/

Tomcat native library

https://tomcat.apache.org/native-1.3-doc/

Open-source Java web server by Apache, 7.x branch

http://tomcat.apache.org/

Open-source Java web server by Apache, 8.5.x branch

https://tomcat.apache.org/

Open-source Java web server by Apache, 9.0.x branch

https://tomcat.apache.org/

Toolbox bundle for GNUstep

http://www.nongnu.org/toolbox/

Anonymizing overlay network for TCP

https://www.torproject.org/

Efficient way to prepare zipfiles for BitTorrent

http://trrntzip.sourceforge.net

GObject-based library to parse a host of playlist formats

Trusted Platform Module (TPM) emulator

http://tpm-emulator.berlios.de/

Object database, tag/metadata database, search tool and indexer

https://wiki.gnome.org/Projects/Tracker

Miners for tracker2

https://wiki.gnome.org/Projects/Tracker

Traditional (K&R-style) C preprocessor

https://www.NetBSD.org/~dholland/tradcpp/

Tools to convert Xfig .fig files

Meta-port for Transmission BitTorrent client

http://www.transmissionbt.com/

Meta-port for Transmission BitTorrent client

http://www.transmissionbt.com/

Meta-port for Transmission BitTorrent client

http://www.transmissionbt.com/

Meta-port for Transmission BitTorrent client

http://www.transmissionbt.com/

Meta-port for Transmission BitTorrent client

http://www.transmissionbt.com/

Open-source TCG Software Stack

https://sourceforge.net/projects/trousers/

Allow non SOCKS aware applications to use SOCKS without modification

http://tsocks.sourceforge.net

True Type Font to Postscript Type 1 Converter

http://ttf2pt1.sourceforge.net/

Automatic font hinting library

https://www.freetype.org/ttfautohint/

MySQL performance tuning primer script

https://launchpad.net/mysql-tuning-primer

3D penguin racing game using OpenGL

http://tuxracer.sourceforge.net/

Number of fonts which are useful for TV applications

http://linux.bytesex.org/xawtv/tvfonts.html

Digital TV and radio guide

https://www.tvbrowser.org

Color emoji font using Twitter Unicode 10

https://github.com/eosrei/twemoji-color-font

Tab Window Manager for the X Window System

MPEG Audio Layer 2 encoder

http://twolame.sf.net/

Converts flat ASCII text to man page format

http://mvertes.free.fr/

Ubuntu font family

https://design.ubuntu.com/font/

GPG keys for Ubuntu package signature verification

https://bugs.launchpad.net/ubuntu/+filebug

GTK+ 2.x engine from Ubuntu Dapper

http://packages.ubuntu.com/feisty/source/ubuntulooks

Universal charset detection library

https://www.freedesktop.org/wiki/Software/uchardet/

Data compression library with low memory usage

https://www.oberhumer.com/opensource/ucl/

Command-line tools for building TCP client-server applications

http://cr.yp.to/ucspi-tcp.html

DNS resolver library with sync and async queries

https://www.corpit.ru/mjt/udns.html

UEFI-EDK2 firmware for bhyve

https://github.com/freebsd/uefi-edk2/tree/bhyve/UDK2014.SP1

UEFI EDK2 firmware for bhyve with CSM (16-bit BIOS)

https://github.com/freebsd/uefi-edk2/tree/bhyve/UDK2014.SP1

Fast copy utility for UFS filesystem

http://people.freebsd.org/~simokawa/ufs/

HTTP web service mocking library for GNOME

https://gitlab.com/groups/uhttpmock

Convert MagicISO UIF files to ISO9660

http://aluigi.altervista.org/mytoolz.htm

Ultra lightweight xml-rpc library written in C++

http://ulxmlrpcpp.sourceforge.net/

Extract, view & test ACE archives

http://www.winace.com/

Allows files to be extracted from ARJ archives

http://www.arjsoftware.com/

Validating, recursive, and caching DNS resolver

https://www.nlnetlabs.nl/projects/unbound

Remove idle cursor image from screen